call case statement inside case statement

[eword]

I am writing a program which requires me to execute a case statement inside another case statement. Although this sounds like a simple thing, I need to be able to call the case statement using a sequence structure, where s1 sends a true value to the case, s2 a false. I then need to save the results of this case statement to a text file. Attatched is a simplified version of what I am trying to do. Also please note that do to the way my program executes I cannot call the case statement without using a sequence structure, so nesting the two case statements is not feasible. Hopefully someone out there can help me as I have been stuck trying to work this out for a while.

Thanks

[eword]

Sorry here is the attatchment.

[GovBob]

Look into using a State Machine for this. It will work just great. I will also save you from using local variables which have there place but are usually abused. I was going to write you a quick example but have to head home. I'm not sure of your logic of when to 'Save' and when to 'Calculate' ? I'll try to write and example if I have time when I get home. There are plenty of example on this site if you search. Once you learn this construct you will really be on your way..

Hope this helps.

[Harold_Timmis]

I think a state machine or a event driven architect can work for you.

[eword]

I dont think I can use a state machine to solve this problem. The program I am working on performs a detailed calculation on one data set when the user hits the calculate button. However when I have several sets of data I want to be able to automatically perform a calculation on each of these data sets and then append the results to a text file. Hence the two seperate case statements. If someone could provide an example that would be really helpful.

Thanks again.

[GovBob]

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LVStudent wrote:

 The program I am working on performs a detailed calculation on one data set when the user hits the calculate button.

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Event structure with a producer/consumer architecture using queue's or other methods.

"However when I have several sets of data I want to be able to automatically perform a calculation on each of these data sets and then append the results to a text file."

Seperate data acqusition from processing and filing.

These are pretty advanced concepts..what is your time line to finish this?

There are plenty of good people here to help!

[eword]

I am working on a program for my thesis. So the sooner I get it done the better, then I can have something to write up.

[Harold_Timmis]

Well, for starters the stacked sequence structure is normally not a good structure to go with also you may have some race conditions with your local variables.

[jcarmody]

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LVStudent wrote:
I am working on a program for my thesis. So the sooner [you] get it done [for me] the better, then I can have something to write up.

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[jcarmody · Accepted solution]

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LVStudent wrote:

[...] I cannot call the case statement without using a sequence structure

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Yes you can.  You just need to be clever.

 

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LVStudent wrote: 

I don't think I can use a state machine to solve this problem.

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 I think you probably can. 

As for your original post; what are these s1 and s2 of which you speak?  My take on it is that you want to select a case based on the values of more than one boolean control.  If this is correct, I like to do this:

 

Build your boolean controls into an array, convert the array to a number and feed this into your case structure.  Neither button pushed = 0, s1 only = 1, s2 only = 2, both = 3.   This works for as many booleans as you need and is an easy way to make a decision that depends on many inputs.